package cn.edu.sjtu.se.dslab.dao;

import java.util.List;

import cn.edu.sjtu.se.dslab.project.PGroup;


public interface IPGroupDao {
	
	
	public void save(PGroup pgroup);
	
	public PGroup update(PGroup pgroup);
	
	public List<PGroup> queryByList();

	public PGroup queryById(long id);
	
	public List<PGroup> queryValidPGroups();
}
